Can anyone diagnose this?
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From: Shit stinkin Newtown CT. USA!
Can anyone diagnose this?
I've got an 04 Fat Boy EFI and it's making a weird noise from the left side of the bike. The best way to describe the sound would be for you to imagine the sound of an air compressor running with a hose hooked up to it, cut the end of the hose and hold your thumb over the end to let the air **** out. Sorta like a pifft, pifft, pifft, pifft, pifft, very quickly. Or think of a plastic grocery bag caught up or tied up on the rear passengers left foot peg, and it flapping in the breeze. It's extremely annoying and happens infrequently. At times it's loud enough to get over the top of the exhaust (V&H Big Radius with baffles removed very loud bike!).
Now check this one out, I thought it was an exhaust leak as I noticed the rear cylinder exhaust bolts loosened up frequently. Also, it seemed ever time I tightened em up, the noise would go away. I replaced the gaskets (HD high performance) and put locking nuts on. Still, the sound! It's weird because the sound only happens at speeds at or above 40 mph and when the bike runs at 200 degrees. It would usually only happen at those speeds while I let off the throttle but is now happening during acceleration. I took it in for service and of coarse the tech took it for a ride and chalks it up as exhaust echo. Dude,,, no way! It's a sound that is not in sync with the exhaust. A buddy of mine thought I had a blown head gasket but I would think the sound would be continues regardless what speed / rpm. I would hear a blown head gasket at idle, no? Again, under 40 mph it goes away. Also, I why would I hear it coming from behind me?
Sounds like a blow off that comes from under my *** just behind and to the left of me! And no, I'm not all that gassy!
I'll tell ya, it's annoying enough for me to not want to ride!
I hope someone here can help!
Thanx in advance,
Jeff
Now check this one out, I thought it was an exhaust leak as I noticed the rear cylinder exhaust bolts loosened up frequently. Also, it seemed ever time I tightened em up, the noise would go away. I replaced the gaskets (HD high performance) and put locking nuts on. Still, the sound! It's weird because the sound only happens at speeds at or above 40 mph and when the bike runs at 200 degrees. It would usually only happen at those speeds while I let off the throttle but is now happening during acceleration. I took it in for service and of coarse the tech took it for a ride and chalks it up as exhaust echo. Dude,,, no way! It's a sound that is not in sync with the exhaust. A buddy of mine thought I had a blown head gasket but I would think the sound would be continues regardless what speed / rpm. I would hear a blown head gasket at idle, no? Again, under 40 mph it goes away. Also, I why would I hear it coming from behind me?
Sounds like a blow off that comes from under my *** just behind and to the left of me! And no, I'm not all that gassy!
I'll tell ya, it's annoying enough for me to not want to ride!
I hope someone here can help!
Thanx in advance,
Jeff
Last edited by nm156; Jul 3, 2009 at 11:37 AM.
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From: Woodstock, Ont , Can
Ron
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From: Woodstock, Ont , Can
Do you have a plastic fender extension behind the oil tank. Could it be rattling at just the right wind pressure?
Ron
Ron
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From: Shit stinkin Newtown CT. USA!
I do but the noise doesn't sound much like a rattle at all.
For what it's worth, I was thinking of getting an after market chrome piece so I'll give it a shot.
I'm at a loss for what this noise could be so thanx for any input fellas!
For what it's worth, I was thinking of getting an after market chrome piece so I'll give it a shot.
I'm at a loss for what this noise could be so thanx for any input fellas!
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From: 40 miles Northeast of Indy..
Do U ride in bell bottom pants?? In the 70's I wore bell bottoms pants that flapped in the wind, that might be the plastic bag sound Ur getting..
serious note, do U have bags on her.? if so is the lid flapping?.
Also if the HD HP gaskets Ur using are the SE's, then yes, I have heard they have a problem of sealing, and most Wrench's won't use them cause of that.
serious note, do U have bags on her.? if so is the lid flapping?.
Also if the HD HP gaskets Ur using are the SE's, then yes, I have heard they have a problem of sealing, and most Wrench's won't use them cause of that.